Pending Boost Cancellation

I have a lot of boosts on my friends server, due to some extra money every week. For some reason, I can't boost anymore because "You have a pending boost cancellation. You have to uncancel it before buying boosts."

I have checked about 15 times, neither any of my boosts or my Nitro subscription are cancelled. I have no idea what is going on, how do I fix this so I'm able to boost servers in the future?